The polarity of the induced emf is such that it produces a current whose magnetic field opposes the change that produces it. The induced magnetic field inside any loop of wire always acts to keep the magnetic flux in the loop constant. This inherent behavior of generated magnetic fields is summarized in Lenz's Law.he polarity of the induced emf is such that it produces a current whose magnetic field opposes the change that produces it. The induced magnetic field inside any loop of wire always acts to keep the magnetic flux in the loop constant. This inherent behavior of generated magnetic fields is summarized in Lenz's Law.
When gross profit ratio is expressed in percentage form, it is known as gross profit margin or gross profit percentage. The basic components of the formula of gross profit ratio (GP ratio) are gross profit and net sales. Gross profit is equal to net sales minus cost of goods sold.
Profit margin, also known as net margin, net profit margin, or net profit ratio, is the net profit as a percentage of net revenue â the percentage of selling price that turned into profit, i.e. the amount by which revenue from sales exceeds a businessâ costs. Put simply, it is a measure of a businessâ profitability.